http://www.piclist.com/member/210.54.18.174 PIC/PICList FAQ: http://www.piclist.com Possibly its a 3 x rate gyro with differential out for noise immunity. I've got position data from ADXRS300 analogue gyro by scaling then A2Ding it every few milliseconds. The voltage, each sample, is proportional to the angle moved. Watch out for drift. Cheers, Brian Harris -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist